package com.jamie.example.rpc.provider.server;

import com.jamie.example.rpc.provider.handler.RpcServerHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 启动类
 * @author jamie
 */
@Service
public class RpcServer implements DisposableBean {

    private NioEventLoopGroup bossGroup;

    private NioEventLoopGroup workerGroup;

    @Autowired
    RpcServerHandler rpcServerHandler;

    public void startServer(String ip, int port) {
        try{
            //1. 创建线程组
            bossGroup = new NioEventLoopGroup(1);
            workerGroup = new NioEventLoopGroup();
            //2. 创建服务端启动助手
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            //3. 设置参数
            serverBootstrap.group(bossGroup, workerGroup)
                           .channel(NioServerSocketChannel.class)
                           .childHandler(new ChannelInitializer<SocketChannel>() {
                               @Override
                               protected void initChannel(SocketChannel channel) {
                                   ChannelPipeline pipeline = channel.pipeline();
                                   //添加String的编解码器
                                   pipeline.addLast(new StringDecoder());
                                   pipeline.addLast(new StringEncoder());
                                   //业务处理类
                                   pipeline.addLast(rpcServerHandler);
                               }
                           });
            //4.绑定端口
            ChannelFuture sync = serverBootstrap.bind(ip, port).sync();
            System.out.println("==========服务端启动成功==========");
            sync.channel().closeFuture().sync();
        }catch(InterruptedException e){
            e.printStackTrace();
        }finally{
            if(bossGroup != null){
                bossGroup.shutdownGracefully();
            }

            if(workerGroup != null){
                workerGroup.shutdownGracefully();
            }
        }
    }

    @Override
    public void destroy() {
        if(bossGroup != null){
            bossGroup.shutdownGracefully();
        }

        if(workerGroup != null){
            workerGroup.shutdownGracefully();
        }
    }

}
